Isabel (b. c.1270, d. after 1313), daughter of Colban, earl of Fife. She deserted her husband, John Comyn earl of Buchan (d.1308) in 1306; she was captured after the battle of Methven and was imprisoned at Berwick Castle. She was released in 1313. [http://www.oxforddnb.com/view/article/6047]